Transformer.



L. c. N I CHOLS. TRANSFOR VMER. APPLICATIONFILED JULY 12. 1909 Patented May 25, 1915.

LOUISE. NICHOLS, OF MILWAUKEE, WISCONSIN, ASSIGNOR. BY MESNE ASSIGNMENTS, T ALLIS-GHALMERS MANUFACTURING COMPANY, A CORPORATION OF DELAWARE TRANSFORMER.

mitoses. a

To (IP31 whom it may concern:

Be known that I, LOUIS C. NICHOLS, a

. citizen (Of he United States, residing at whichare provided with means for making Milwaukee, in the county of Milwaukee and State of ll isconsin, have invented certain new and useful improvements in Transformers, of which the following is a full,

clear, and exact specification.

My invention relates to electrical apparatus such as transformers and the object of my invention is to ventllateaiiid cool such apparatus in a simple and effective manner;

This invention consists incertain novel details of construction and arrangement of parts to be described in the following specifia cation and set forth in the appended claims.

In the accompanying drawings Figure l is a sectional view of a transformer equipped with my invention; 'and Fig. 2 is a top view of the same transformer with the cover re moved. i

Referring to the figures a transformer inclosed. in a casing having a main shell 11, a bottom 12 and cover 13. Located within this casing is a tank or baflle 14: whichis secured to the bottom of said casing. Inside of the tank 14 is a frame 15 upon which is -supported a laminated core 16 comprisingtwo parts. High" electrical connections .for said leads. The leads 22 are surrounded by insulating mate rial 23 and pass through the cover 13 of the transformer casing and also through bushings 24 secured to said cover. The frame 15 is reinforced by means of bolts 25 which retain the laminae of the core in a fixed position, and two or more of the bolts 25 are provided with eyes through which hooks may pass to remove the transformer proper from the casing without disturbing any of the other parts.

Located between the main shell 11 of the transformer casing and the tank 14 is a coil of the drawing, 10 represents a base upon which is mounted? Specification of Letters Patent. patentgd ltfifgmy 25 1915:, Application filed July 12, 1909. Serial No. 507,213. 7 I

consisting of several turns of pipe which extends circumferentially around said tank. This coil 26' is provided with an inlet 27 and an outlet'28, and is filled with a circulating cooling fluid such as water.- The coil is held in position by means of supporting members with a pipe 30 which passes through the casing of the transformer and through the tank 14:, and is also provided with another pipe 31 which leads from the transformer such as oil, is forced, by means of the pump, through the pipe 30 and is directed by means of the baflie or tank 14 through the internal .structure of the core and coils and then overflows at the top of the tank coming in contact with the coil 26 which is filled with a circulating fluid of low temperature, thus cooling the oil which has become heated. Thel overflowing oil then passes down between the main shell of the transformer casing and the tank returning to the pump through the pipe 81. The oil in the transformer is maintained at a level indicated by the line-O() in Fig. 1. The oil which is heated-to a certain extent while passing through the'core and coil structure is cooled rapidly when it comes in contact with'the casing to said pump. An insulating fluid, 1

coil containing the circulating cold water. By means of this pump a continual ciroulation of oil is kept up maintaining the trans former inpractically a cool and economical operating condition. g

, It is obvious that there may be many modifications of the precise arrangement here shown and described, and I aim in my claims to cover all modifications which do through said transformer, a casing inclosing sald tank and spaced therefrom, and means at v means for maintaining a fluid circulation v betweensaid casing and saidtank-for cooling said fluid, which is forced by said circulating means intosaid tank, through said spaces, over the top of saidtank, coming in contact with said cooling means, and passing down between said tank 'andsaid easing into said circulating means.

, 2; The -combinationof electricalappara -l' 'tus, a casing .inQlosing. said apparatus; a fluid in which sald apparatus is immersed means inside said casing for cooling said fluid, andmeansfor causing a. circulation" of said fluidthrough said electrical appara-g tus andinto contact with said cooling means,

said means for causing circulation of saidinsulating fluid being between said cooling I means and said electrical apparatus-to re+' ceive fluid that has passed from said electri- .031 apparatusand into contact with said .20

cooling means and to force said cooledfluid intoicontact wlth said electricalapparatu's;

3. The combination of electrical apparatus, a; casing inclosinglsaid aapp'ara'tus, insulatingfluid in WlIlCh said apparatus is im- 25 said insulating fl'uidl. c0mpf1s ing .a coilthrough which a -cooli ngfluidflows'fsaid inersed, means insidei'said'caslng for coolingcooling fluid being admitted to said coil at the lower end thereof and lea' ing'said Qco'il at-the upper endfthereof and means for forcing said insulating fluid through said apparatus and into contact with said cooling means said forcing meansreceivingfluid' [ing and said tankfor coolingsaid insulating fluid and comprising a coil through which a cooling fluid flows, said cooling end thereo f'and'leaving said coil at the upper. end thereof, and means for causin circulation of said insulating fluid through said apparatus andintocontact with said cooling-means, said insulating fluid as it pass'esfr'om said electrical apparatus to'said coil coming into contactwiththe upper por 'tionofisald coil and passing to the-lower portion on its way to the circulation causing means. l

- in testimony sass y (me, in the presence of two witnesses; LOUIS G; NICHOLS.

i signaf Witnesses: I 4i Ll BYRON,

, 1 Ron; STOLLL' and forcing said fluid into contact'with said.

fluid being admitted to said 6 11 at the lower 

